15-27 Mercer Street, ca. 1915.

The building at left (nos. 15-17) are a 1886 cast iron facade loft building. Surprisingly, it is a relative newbie on this block, where 11 of the 17 buildings were constructed before 1861.

No. 19 (at center with the arched windows at the third and the fifth floors) is a 1861 stone building, constructed for S.B. Althuas, who had an iron works on this same site as early as 1852.